Move printing defines to buildflag system.

components/printing/test/print_mock_render_thread.h

Index: components/printing/test/print_mock_render_thread.h
diff --git a/components/printing/test/print_mock_render_thread.h b/components/printing/test/print_mock_render_thread.h
index a483fa153b388a3a793a8a3849b31ae17c7abc1d..1ce0b030cd46bd05894296451843e2e8f0b059dd 100644
--- a/components/printing/test/print_mock_render_thread.h
+++ b/components/printing/test/print_mock_render_thread.h
@@ -15,6 +15,7 @@
 #include "base/single_thread_task_runner.h"
 #include "build/build_config.h"
 #include "content/public/test/mock_render_thread.h"
+#include "printing/features/features.h"
 
 namespace base {
 class DictionaryValue;
@@ -43,7 +44,7 @@ class PrintMockRenderThread : public content::MockRenderThread {
   void set_io_task_runner(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
 
-#if defined(ENABLE_PRINTING)
+#if BUILDFLAG(ENABLE_PRINTING)
   // Returns the pseudo-printer instance.
   MockPrinter* printer();
 
@@ -62,7 +63,7 @@ class PrintMockRenderThread : public content::MockRenderThread {
   // Overrides base class implementation to add custom handling for print
   bool OnMessageReceived(const IPC::Message& msg) override;
 
-#if defined(ENABLE_PRINTING)
+#if BUILDFLAG(ENABLE_PRINTING)
 #if defined(OS_CHROMEOS) || defined(OS_ANDROID)
   void OnAllocateTempFileForPrinting(int render_view_id,
                                      base::FileDescriptor* renderer_fd,
@@ -79,7 +80,7 @@ class PrintMockRenderThread : public content::MockRenderThread {
 
   void OnDidGetPrintedPagesCount(int cookie, int number_pages);
   void OnDidPrintPage(const PrintHostMsg_DidPrintPage_Params& params);
-#if defined(ENABLE_PRINT_PREVIEW)
+#if BUILDFLAG(ENABLE_PRINT_PREVIEW)
   void OnDidGetPreviewPageCount(
       const PrintHostMsg_DidGetPreviewPageCount_Params& params);
   void OnDidPreviewPage(const PrintHostMsg_DidPreviewPage_Params& params);